package chapter05.Example09;

public class Example9 {
    private static final int TIMES = 100000;
    public static void main(String[] args){
        Example9.testString();
        Example9.testStringBuffer();
        Example9.testStringBuilder();
    }
    public static void testString(){
        long startTime = System.currentTimeMillis();
        String str = "";
        for (int i = 0;i < TIMES;i ++){
            str += "test";
        }
        long endTime = System.currentTimeMillis();
        System.out.println("String test usedtime:" + (endTime - startTime));
    }
    public static void testStringBuffer(){
        long startTime = System.currentTimeMillis();
        StringBuffer str = new StringBuffer();
        for (int i = 0;i < TIMES;i ++){
            str.append("test");
        }
        long endTime = System.currentTimeMillis();
        System.out.println("StringBuffer test usedtime:" + (endTime - startTime));
    }
    public static void testStringBuilder(){
        long startTime = System.currentTimeMillis();
        StringBuilder str = new StringBuilder();
        for (int i = 0;i < TIMES;i ++){
            str.append("test");
        }
        long endTime = System.currentTimeMillis();
        System.out.println("StringBuilder test usedtime:" + (endTime - startTime));
    }
}
